george



E. C. GEORGE.

FLANGED AHHGLF.

,Putontvd July 15, 191).

2 SHEETSSHEET l.

E. C. GEORGE.

FLANGED ARTICLE.

APPLICMIQN man 1AN.2:,1915.

ll ,309,799. rammed July 15, 1919.

2 SHEETS-SHEET 2.

rUETTED sTATEs PATENT oEEIcE.

EDGAR. G. GEORGE, 0F NORWOOD, OHIO, ASSIGNOR T0 ALLIS-CHALMERS MANUFACTUR-V ING COMPANY, 0F MILWAUKEE,

WISCONSIN, A CORPORATION 0F DELAWARE.

PLAN GED ARTICLE.

Specification of Letters Patent.

Patented J Illy 15. 1919.

Application filed January 27, 1915. Serial No. 4,793.

To all whom z't may concern Be it known that EDGAR C. GEORGE, a citizen of the United States residing at Norwood, in the county of Hamilton and State of Ohio, has invented a certain new and useful Improvement in Flanged Articles, of which the following is a specification.

This invention relates in general to articles of manufacture wherein a body portion is provided with one or more flanges.

In certain cases, as, for instance, where one member is to be insulated from a second member through which the first member passes, it is often desirable to use a flanged tubular element as the insulating medium between the parts. Where the insulating bushing is flanged at both ends and is to be used for insulating telescoping conducting members, it is necessary that at least one flange be secured to the body portion after the conducting members are in lace one within another. Further, where t e flanges cannot be east or formed integrally with the body portion of the bushing, the method of forming the flanged bushing and the character of the union between the flange and the body portion are important factors in determining the mechanical and insulating properties of the finished article.

It is an object of this invention to provide an improved construction of an article of manufacture comprising a flanged body portion.

It is a further object of this invention to provide an improved construction of an article of manufacture comprising va body portion provided with flanges at both ends.

It is a further object of this invention to provide an improved construction of a flanged bushing.

Itis a further object of this invention to provide an improved method of producing a flanged article.

It is a further object of this invention to provide an improved method of producing a flanged insulating bushing.

These and other objects are attained by this invention, the various novel features of which will appear from the description and drawings, disclosing one embodiment of such invention, and will be particularly pointed out in the claims.

In the accompanying drawings:

igure 1 ,is a sectional view through a pordyomo-'electric machine showing a flanged insulating bushing embodying features of this invention and used to insulate a brush rod and its securing means from a sup ort.

1g. 2is a fragmentary sectional view of Athe body portion of the bushing shown in 'ig. 3 is an elevation of a section of materlal from which the Harige portion of the bushing is formed.

Figs 4 and 5 are partial sectional elevations of apparatus used in forming the flange portions of the bushing shown in Fig. 1, and illustrate steps in the process of manufacture of such flange portions.

Fig. 6 is a view similar to Fig. 1, showing a modified form of flanged bushing.

Fig. 7 is a fragmentary sectional view of he bidy portion of the bushing shown in Figs. 8, 9 and 10 are partial sectional clevations of apparatus used in forming the flange portions of the bushing shown in Fig. 6, and illustrate steps in the process of manufacture of such flange portions.

Figs. 11 and 12 are partial sectional elevations of apparatus used in forming the flange portions of the bushingof Fig. 1, and illustrate steps in a modified process of manufacture of such Harige portions.

In the drawings, the invention is shown as embodied in a flanged bushing of a. type useful for insulating a memberfrom a second member through which the first member passes. As shown in Fig. 1, a member 10, usually associated with-the frame of adynamo-electric machine, acts as a support for a rod 11, such as is used for supporting brushes, the rod passing through an opening 12 in the support 10 and being insulated from the lating material. This bushing comprises a tubular body portion 14 and flanges 15 associated with the ends of the body portion 14. The rod 11 is held in place relatively to the support 10 by means of nuts 16 engaging with threaded portions of the rod and bearing upon the flanges 15 through the intermediary of washers 17, the bushing being of such length that the flanges 15 are in contact with the sides of the support 10 adjacent the bore 12.

The end portions of the body portion 14 of the bushing are internally l a or bevdecl, u at 18 in Fr@ 2, an'dthe support by a bushing 13 of insnflanges 1f are provided with tubular extensions Q1. tapered or beveled on their outer sides to fit within the ends of' body portion 14 and to engage with the flared or bcvcle'l portions lo thereof'` thtI inner diameter of' the body portion and of' the tubular extensions of the flanges bring the same.

ln the manufacture of the flanges of the. bushing 13. a section of material 19, of a size and thickness equal to those of the flange desired, is made up, preferablyof layers of paper or other suitable insulatin material impregnated with a suitable a hesive insulating material. This section of material is partially dried and is cut to the desired lform and starred. as indicated in Fig. 3. by making through incisions at about the center thereof which form partially cut sectors 2U, the radial length of the incisions being approximately the same as the radius ot' thtx bore of the bushing. This section of material or disk 19 is laid on the upper side of a mold 24 having a cylindrical bore 25 outwardly flared at its upper end, as indicated at 26. A cooperating core 27 is made up of a body portion 28 from the under side of which extends a cylindrical die portion 29 of a diameter equal to the desired inner diameter of the tubular extension 21, and a beveled or cone-shaped end 30. The core is moved toward the disk 19, the beveled end 30 passing through the starred portion and folding back the partially cut sectors 20, as indicated in Fig. 4. Continued movement of the core relatively to the mold causes the cylindrical die portion .29 to pass through the disk 19. this action forcing the portions` of the disk back against the vvalls of the flared bore 2U and displacing such portions to form the tubular extension 21, as indicated in Fig. 5. Stated in other words, the material of thc portions 2O of the disk is caused to flow, the layers or particles shifting with respect to each other. and thus the gaps between t-he tapered ends of said portions are substantially filled. The core is preferably moved to such position that the under side of the body part 28 engages the upper side of the part 19. These parts may be drawn to such position and held therein, as by a nut 301 which may engage a threaded portion 31 at the lower end of the die portion Q9. The completely formed flange is preferably baked while in the mold, and, when the same is sufficiently hardened, the core and mold are separated and the flange removed.

In assembling the bushing. the body portion 14 and the two oppositely disposed flanges may be passed over the rod 11, the beveled portions 18 of the body portion being treated with a suitable adhesive material of an insulating character, preferably a heavy bakelite varnish being used. The

flanges 15 may then .be clamped in position` with the axial extensions 21 forced against the beveled portions 18, the securing nuts 16 and washers 17, beiner used for this purpose. With the parts of tie bushing in position and the dynamo-electric machine being otherwise ready for operation, a test run is started, heat developed during the heat run of the machine being suflicient to harden the adhesive material used between the beveled portions of the body portion and flanges and to cement the flanges to the body portion, giving a finished article having the required mechanical and dielectric properties.

The modified form of bushing 13 shown in Fig. 6 comprises a body portion 14Il havingr its ends externally tapered or beveled, as indicated at 18L in Fig. 7, and flanges 15 provided With axial tubular extensions 21 that are internally beveled or flared to fit the beveled portions 18l of the body portion 14a.

In forming the flanges 15i1 of the bushing 13` sections of material 19a, similar to the sections 19 used for forming the flanges 15 of the bushing shown in Fig. 1, are used. A section of material or disk 19a is placed on the upper side of a mold portion 24, which is 1n turn disposed upon a mold portion 24", the mold portion 24 being provided vvith a cylindrical bore 25 of a diameter equal to the outer diameter of the axial extension 21 of the finished flange, and the mold portion 24b being provided with a cylindrical bore 25b of a diameter equal to the inner diameter of the finished bushing. A core portion 27"* comprises a body portion 28 from the under side of which projects a die portion 32 of such diameter as to fit close` within thc bore 25", and a die portion 29 ofl such diameter as to fit close Within the bore 25", the two die portions being connected by a beveled portion 34, and the die portion 29 being provided with a beveled end 30. The beveled end 30" and the die portion 29 of the core are forced through the disk 19"I to fold back the partially cut sectors 20 to the general position indicated in Fig. 8. The core is then removed and the mold portion 24 and the disk 19'i are inverted, the disk being disposed between the mold portions 24 and 24h Which are arranged with the axes of their bores in alinement, and the portions 20* occup ing the bore 25, the relative position of t e parts being that indicated in Fig. 9. The oore is then forced downward and the beveled end 30'* and the die portion 29a passed through the bore 25 of the mold portion 24", the beveled die portion 34 pressing the partially cut sectors 20* back against the Wall of the bore 25, giving these sectors the form of an internally beveled tubular extension 21, as shown in Fig. 10. The core may be drawn to this position and held therein, as by means of a nut 301 engaging a. threaded portion. 31 et the die lportion 29". The formed flange may be aked while in the mold, and when the same is sufficiently baked, the core and molds are se arated and the flange removed.

he flange and body portions of the bushing 13* may be assembled on the brush rod of a dynamo-electric machine in the manner f described in connection with the bushing 13 shown in Fig. 1, and the heat developed during a heat run will be sufficient to thor- ,oughly cement the parts together, giving a finished article of very high mechanical and dielectric strength.

As indicated in Figs. 11 and 12, flange 15 may also be formed by pressing over the 1die portions 29 and 30, preferably with these parts in position inverted relative to that of Figs. 4 and 5, the required number of prepared sheets or layers of material of the same forni ,as indicated vat 19 in Fig. 3 and starred to provide uncut sectors 20, individual sheets or layers being designated by 191 and by using the mold portion 24 to follow up these layers, these operations amounting to a substantial reversal of the steps of the method first described. The mold portion 24 may be urged by the nut 301 to such position that the uncut sectors 20 are forced to occupy the flared portion 26 of the bore 25. The core and mold portions may be suitably held in the proper position, as by the nut 301, and the formed flange may be baked with the parts in these positions.

Again, flanges may be formed in another way, as by being molded from a plastic insulating material and baked while in the mold, and the finished flanges may be then cemented to the body portion of the bushing as generally described above.

It will be obvious that, in accordance with this invention, a flanged article is provided Which is comparatively simple and cheap to manufacture, and is possessed of great mechanicalstrength, due to the increased bearing of the tubular extensions of the flanges on the beveled ends of the body portion, one of the parts being inserted Within another and being cemented thereto along the entire engaging surfaces.

It should be understood that it is not desired that the claims be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent: 4

1. A method of forming a flanged insulating bushing which .comprises forming a tubular body4 portion with beveled ends, distorting sheets of insulating material to provide flanges having oppositely beveled axial, tubular extensions, and uniting said flan es to said body portion with beveled surwes of the parts in engagement;

2. A method of forming a flanged insulatin bushing which comprises forming a tubu ar body portion with beveled ends, distorting a sheet of insulating material to provide a flange portion having an oppositely beveled, axial, tubular extension, and uniting said oppositely beveled parts with the beveled surfaces thereof in engagement.

3. A method of forming an article of manufacture which comprises making through incisions in a laminated sheet of material, pressing back the material between said incisions at approximately right angles to the body of the sheet, and distorting the pressed back material to form a continuous, tubular, beveled extension.

4. A method of forming a flanged insulatting bushing which comprises forming a tubular body portion with a beveled surface, forming a flange with an oppositely beveled surface, assembling said body and flange portions on a conducting element with said beveled surfaces adjacent each other and a cementitious material therebetween, and passing any electric current through said conducting element to bake said cementitious material and cement said body and flange portions together.

5. A method of forming a flanged insulating bushing which comprises forming a tubular body portion with beveled ends, forming flanges havin axial, tubular extensions beveled oppositely to the beveled ends of said body portion, assembling said body portion and flanges on a conducting element with thesbeveled surfaces of the body portion and flanges immediately adjacent each other, and cementitious mate-V rial therebetween, and passing an electric current through the conducting element to bake said cementitious material and cement the body portion and flanges together.

6. A method of forming a flanged insulating bushing which comprises forming a tubular element with a beveled end portion, forming a second tubular element with an oppositely beveled end portion and a radial flange, assembling said tubular elements on an element of electrically conductive material with said oppositely beveled surfaces closely adjacent each other and a layer of cementitious material between said surfaces, and causing an electric current to flow through said 'conductive element to bake said cementitious material and unite said tubular elements.

7. A method of forming an insulating bushing which comprises forming tubular elements with oppositely beveled end portions, assembling said tubular elements on an element of electrically conductive material with said oppositely beveled surfaces closely adjacent each other and a layer of cementitious material between said surfaces, and. causing' an electric current to flow through said conductive element to bake said cementitious material and unite said tubular elements.

8. A method of forming a flanged article which comprises beveling an end portion of said article, distorting a piece of sheet material to form a flange portion having an axial extension With a bevel opposite to that of said first rtion and unlting said portions with sai axial extension extending toward the opposite end of said article and the beveled surfaces of the parts in engagement.

9. A method of forming an article of manufacture which comprises puncturing a sheet of flowable hardenable material thereby causing the parts adjacent said puncture to be bent at an angle to said sheet and whereby said parts are given a taperin cross-section in the general direction o their length, and then hardening the flowable material.

10. As an article of manufacture, a bushing comprising a tubular portion having a beveled end and at least one flange comprising a laminated sheet of material having an integral tubular beveled extension to coact with the said beveled end of the body portion.

11. As an article of manufacture, a bushing comprising a tubular portion and two end-flanges made of a laminated sheet of material. said tubular portion comprising integral tubular beveled eXtensiQns on said flanges.

12. As an article of manufacture, a flange-like member made of a unitary piece of laminated material, said member having an aperture bounded by an integral tubular extension.

13. As an article of manufacture, a

flange-like member made of a unitary pieceA of laminated material, said member having an aperture bounded by an integral tubular beveled extension.

14. A method of forming an article of manufacture which comprises perforating a sheet of flowable material so that the edgeportions of the perforation are indented and bent at an angle to said sheet, and compressing said edge-portions so that the said portions will beoome substantially non-indented.

15. A method of forming an article of manufacture which comprises perforatin a sheet of flowable insulating material so t at the edge-portions of the perforation are indented and bent at an angle to said sheet, and compressing said edge-portions so that the said portions will become substantially non-indented.

16. A method of forming an article of manufacture which comprises perforating a sheet of ilowable laminated insulating material so that the edge-portions of the perforation are indented and bent at an angle to said sheet, and compressin said ed eportions so that the sald portions will ecome substantially non-indented.

17. A method of forming an article of manufacture which comprises perforating a sheet of flowable laminated material so that the edge-portions of the perforations are indented and bent at an angle to said sheet, and compressing said edge-portions so that the said portions will become substantially non-indented and form a beveled tubular extension.

18. A method of forming an article of manufacture which comprises puncturing a sheet of floWable laminated material thereby causing the parts adjacent said puncture to be bent at an angle to said sheet, and compressing said parts to cause them to flow to form a substantially continuous tubular extension. l

19. As an article of manufacture, a flangelike member lmade of a unitary piece of laminated insulating material, said member having an aperture bounded by an integral beveled tubular extension.

In testimon whereof the signature of the inventor is a xed hereto in the presence of two Witnesses.4

EDGAR C. GEORGE.

G. E. Rnrrr. 

